feat: 三协议互转网关 + 鉴权修复 + 管理端增强

后端
- 新增 proxy/convert 三协议（chat/messages/responses）请求、响应与 SSE 流式互转，
  以 Chat 为中间模型；usage.go 统一提取三协议 token 用量（含单测）
- gateway: 跨协议调度（渠道未声明客户端协议时转为渠道首选格式），
  streamResponse 按 \n\n 分块逐行转换直通，bufferResponse 转换失败时剥非 JSON 前缀
- gateway: 新增 SetUsageRecorder 注入异步用量记录器
- auth_llm: 修复 key_prefix 查询长度错配（[:8] vs 存储的 [:12]）导致全部 401；
  修复长度 8-11 的 key 切片越界 panic；统一 unauthorized 响应
- usage: 日报表改为增量累加 upsert，避免多次 flush 互相清零；记录协议/错误码/时延等字段
- channel: 新增渠道并发槽 TryAcquire；健康检查支持可配置参数
- api: 新增 admin 渠道/模型/系统配置管理端点（旧端点保留兼容）

前端
- 新增渠道管理、模型管理、系统配置视图与 ChannelModelsDrawer
- 新增 ui 基础组件（Button/Badge/Input/Modal）与 protocol.ts
- 调整 Toast 样式、密钥页、路由菜单；dev 代理默认指向 3000 端口

backend/router/setRouter.go

@@ -50,7 +50,7 @@ func SetRouter(cfg *config.Config, db *gorm.DB, web *embed.FS) {
 
 	// Initialize health checker and start periodic checks
 	healthChecker := channel.NewHealthChecker(channelDAO, channelSvc)
-	go healthChecker.StartPeriodicCheck(ctx, 5*time.Minute)
+	go healthChecker.StartPeriodicCheck(ctx)
 
 	// Initialize usage recorder and start background worker
 	usageRecorder := usage.NewRecorder(usageDAO, dailyDAO)
@@ -60,7 +60,7 @@ func SetRouter(cfg *config.Config, db *gorm.DB, web *embed.FS) {
 	// Initialize gateway
 	gateway := proxy.NewGateway(ctx, cfg, db, &wg, userDAO, apiKeyDAO, usageDAO, dailyDAO)
 	gateway.SetChannelService(channelSvc)
-
+	gateway.SetUsageRecorder(usageRecorder)
 	// Initialize API handler
 	apiHandler := api.NewHandler(db)
 
@@ -99,7 +99,7 @@ func SetRouter(cfg *config.Config, db *gorm.DB, web *embed.FS) {
 		apiGroup.DELETE("/keys/:id", apiHandler.DeleteApiKey)
 		apiGroup.POST("/keys/batch/:option", apiHandler.BatchApiKeys)
 
-		// Channel management
+		// Channel management (legacy endpoints)
 		apiGroup.GET("/channels", apiHandler.ListChannels)
 		apiGroup.POST("/channels", apiHandler.CreateChannel)
 		apiGroup.PUT("/channels/:id", apiHandler.UpdateChannel)
@@ -107,11 +107,40 @@ func SetRouter(cfg *config.Config, db *gorm.DB, web *embed.FS) {
 		apiGroup.GET("/channels/:id/models", apiHandler.GetChannelModels)
 		apiGroup.POST("/channels/:id/models", apiHandler.BindChannelModels)
 
-		// Model management
+		// Model management (legacy endpoints)
 		apiGroup.GET("/models", apiHandler.ListModels)
 		apiGroup.POST("/models", apiHandler.CreateModel)
 		apiGroup.PUT("/models/:id", apiHandler.UpdateModel)
 		apiGroup.DELETE("/models/:id", apiHandler.DeleteModel)
+
+		// Admin channel management (enhanced)
+		apiGroup.GET("/admin/channels", apiHandler.AdminChannels)
+		apiGroup.POST("/admin/channels", apiHandler.AdminCreateChannel)
+		apiGroup.PUT("/admin/channels/:id", apiHandler.AdminUpdateChannel)
+		apiGroup.DELETE("/admin/channels/:id", apiHandler.AdminDeleteChannel)
+		apiGroup.POST("/admin/channels/:id/test", apiHandler.AdminTestChannel)
+		apiGroup.GET("/admin/channels/:id/models/remote", apiHandler.AdminChannelRemoteModels)
+		apiGroup.GET("/admin/channels/:id/models", apiHandler.AdminChannelModels)
+		apiGroup.POST("/admin/channels/:id/models", apiHandler.AdminChannelAddModel)
+		apiGroup.PATCH("/admin/channels/:id/models/:bid", apiHandler.AdminChannelUpdateModel)
+		apiGroup.DELETE("/admin/channels/:id/models/:bid", apiHandler.AdminChannelDeleteModel)
+
+		// Admin model management (enhanced)
+		apiGroup.GET("/admin/models", apiHandler.AdminModels)
+		apiGroup.DELETE("/admin/models/unused", apiHandler.AdminDeleteUnusedModels)
+		apiGroup.POST("/admin/models", apiHandler.AdminCreateModel)
+		apiGroup.PUT("/admin/models/:id", apiHandler.AdminUpdateModel)
+		apiGroup.DELETE("/admin/models/:id", apiHandler.AdminDeleteModel)
+		apiGroup.POST("/admin/models/:id/bindings", apiHandler.AdminCreateModelBinding)
+		apiGroup.DELETE("/admin/models/:id/bindings/:bid", apiHandler.AdminDeleteModelBinding)
+
+		// Admin system config
+		apiGroup.GET("/admin/config", apiHandler.AdminGetConfig)
+		apiGroup.PUT("/admin/config", apiHandler.AdminUpdateConfig)
+		apiGroup.GET("/admin/config/registration", apiHandler.AdminGetRegistration)
+		apiGroup.PUT("/admin/config/registration", apiHandler.AdminUpdateRegistration)
+		apiGroup.GET("/admin/config/password-login", apiHandler.AdminGetPasswordLogin)
+		apiGroup.PUT("/admin/config/password-login", apiHandler.AdminUpdatePasswordLogin)
 	}
 
 	// LLM proxy routes